export default{
  ranFile(){
    var myFileName=""
    var fileYear=new Date().getFullYear()+""
    var fileMon=new Date().getMonth()+1
    fileMon=fileMon<10 ? "0"+fileMon : fileMon+"";
    var fileDay=new Date().getDate();
    fileDay=fileDay<10 ? "0"+fileDay: fileDay+"";
    myFileName=fileYear+fileMon+fileDay+"/"

    var myId=Number(Math.random().toString().substr(3,3) + Date.now()).toString(36);

    return myFileName+myId;
  },
  
  houZhui(str){
  var idx=str.lastIndexOf(".");
  var hz=str.substring(idx);
  return hz;
  }

}

